CEL P0171 / P0134 after getting A/C Expansion Valve replaced. Well maintained and no other issues before AC repair. Please advise what to check. Prefer not to take back to mechanic.
2 Answers
Bender0013 answered 9 years ago
Code p0134 is bad oxygen sensor bank #1 code p0170 is bad oxygen sensor not heating up.
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Thank you Bender. I did look up the code but I feel like it is too much of a coincidence for it to occur after taking it in and I do not want to bring it back to the same mechanic. Are there any test I can DIY to determine if the sensor is bad?